Subject: Re: linux-next: build warning after merge of the btrfs-kdave tree

From: David Sterba <[email-masked]>
Date: Mon, 28 Jan 2019 17:53:42 +0100

On Thu, Jan 24, 2019 at 09:53:38AM +1100, Stephen Rothwell wrote:
> Hi David,
> 
> After merging the btrfs-kdave tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
> 
> fs/btrfs/relocation.c: In function 'insert_dirty_subv':
> fs/btrfs/relocation.c:2138:6: warning: unused variable 'root_objectid' [-Wunused-variable]
>   u64 root_objectid = root->root_key.objectid;
>       ^~~~~~~~~~~~~
> 
> Introduced by commit
> 
>   7b837199c581 ("btrfs: relocation: Delay reloc tree deletion after merge_reloc_roots()")
> 
> Presumably the ASSERT is compiled out in this configuration.

Agreed, thanks for the report. I'll drop the temporary variable.